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by holmez
Sun Jun 09, 2013 8:19 pm
Forum: Troubleshooting
Topic: Pi beeps for no reason
Replies: 4
Views: 2328

Re: Pi beeps for no reason

That's what I kept thinking. But it only ever happens when the pi is switched on, and the only things connected to it are mouse, external HD, usb hub and psu. There is nothing connected to the line out, and although it is connected via hdmi to a tv, the tv is not switched to hdmi, and sometimes not ...
by holmez
Sat Jun 08, 2013 10:39 pm
Forum: Troubleshooting
Topic: Pi beeps for no reason
Replies: 4
Views: 2328

Pi beeps for no reason

I have a small problem with my pi which has been ongoing, probably for a year now (since I got it). When my pi is running for any length of time, it beeps for no reason. Sometimes it will go a long time between beeping, other times not so long. When it beeps, it is a single, constant beep lasting no...
by holmez
Mon May 27, 2013 10:37 pm
Forum: General discussion
Topic: New version of Pi. When?
Replies: 94
Views: 18636

Re: New version of Pi. When?

Taking a class of about 40 eighth graders to the lab is a behavioral/logistical nightmare, so teachers have to avoid it until troublemakers are inevitably out on suspensions. Some schools have laptops on carts that can be brought to classrooms, but, again, the troublemakers are just as likely to sn...
by holmez
Mon May 27, 2013 10:27 pm
Forum: General discussion
Topic: New version of Pi. When?
Replies: 94
Views: 18636

Re: New version of Pi. When?

[quote="hippy"][/quote] Thank you for the excellent response, I had no idea that it filled a huge gap in the market. I only got interested when it was featured on the news just before its launch, and decided to get one to see what I could do with it. I also had no idea about the other types of board...
by holmez
Mon May 27, 2013 12:56 pm
Forum: General discussion
Topic: New version of Pi. When?
Replies: 94
Views: 18636

Re: New version of Pi. When?

a new version is forthcoming once the demand in the pi has died down to nothing My guess is that neither prediction will happen :D You think pi's will still be flying off the production line in 10 or 20 years time? Be one hell of a success story if that's the case. Correct me if I'm wrong, but I do...
by holmez
Sun May 26, 2013 9:26 pm
Forum: General discussion
Topic: New version of Pi. When?
Replies: 94
Views: 18636

Re: New version of Pi. When?

Suliman wrote:When do you plan to release new version of Pi with more RAM and better CPU?
Based on the comments to date, I would suggest that a new version is forthcoming once the demand in the pi has died down to nothing.
by holmez
Sat May 25, 2013 10:17 pm
Forum: General discussion
Topic: New version of Pi. When?
Replies: 94
Views: 18636

Re: New version of Pi. When?

Now, if you throw a new improved Pi in there you fracture all that effort. Support becomes divided between old and new. A huge amount of effort has to be put in by it's creators to bring it up to the level of stability of the current Pi. A huge amount of effort needs to be put in by all the users o...
by holmez
Sun Mar 10, 2013 12:34 pm
Forum: Beginners
Topic: GPIO pinout
Replies: 6
Views: 8973

Re: GPIO pinout

redhawk wrote:Just be aware the GPIO pins are 3.3v tolerant only, anything higher i.e. 5v and you will damage them.

Richard S.
Is it safe to put the signal through a 3.3v zener diode? Or are there better ways to connect higher voltage signals to the GPIO pins?
by holmez
Sat Mar 09, 2013 10:13 am
Forum: Media centres
Topic: XBMC OpenELEC and LCD HD44780 via GPIO
Replies: 108
Views: 80327

Re: XBMC OpenELEC and LCD HD44780 via GPIO

LCDd would sort out itself what to write on the screen providing the size=16x1 is set correct. The interesting bit is it does it when first switched on or hard reset, but soft reset (sudo reboot) or LCDd restart it works as expected, correct? So maybe a power issue? Is the Pi itself getting enough ...
by holmez
Sat Feb 16, 2013 9:44 pm
Forum: Media centres
Topic: XBMC OpenELEC and LCD HD44780 via GPIO
Replies: 108
Views: 80327

Re: XBMC OpenELEC and LCD HD44780 via GPIO

It does it both when switched on & when rebooted - in fact, it appeared to happen exactly as xbmc flashed up its network detected message. It may be a power issue - I only have a 1A power adaptor, running the pi, a hub, a HD and the LCD screen (I've never had any problems with the pi - I got about 5...
by holmez
Wed Feb 13, 2013 10:51 pm
Forum: Media centres
Topic: XBMC OpenELEC and LCD HD44780 via GPIO
Replies: 108
Views: 80327

Re: XBMC OpenELEC and LCD HD44780 via GPIO

Apologies for not tinkering and updating since - seem to be having a busy week. Would be nice to have the 16x1 working first. Just wondering if there was any way of switching logging on - I notice the ReportLevel and ReportToSyslog options in the configuration file and am wondering if setting these ...
by holmez
Sun Feb 10, 2013 9:42 pm
Forum: Media centres
Topic: XBMC OpenELEC and LCD HD44780 via GPIO
Replies: 108
Views: 80327

Re: XBMC OpenELEC and LCD HD44780 via GPIO

Thanks for your prompt reply boeeerb. It is connected on a breadboard, I have checked the connections again, but can find no loose connections. It seems consistent in that it is always a matter of seconds after XMBC has started that the display corrupts. Running sudo /etc/init.d/LCDd restart fixes t...
by holmez
Sun Feb 10, 2013 11:07 am
Forum: Media centres
Topic: XBMC OpenELEC and LCD HD44780 via GPIO
Replies: 108
Views: 80327

Re: XBMC OpenELEC and LCD HD44780 via GPIO

Hello, I hope someone here will be able to help me solve the problem I'm getting with a corrupt display on an LCD screen. I followed the tutorial on tech-fruits, which worked (almost) perfectly (many thanks for the great tutorial). I have a fully HD44780 compatible 16x1 screen on raspbian. When I tu...
by holmez
Thu Nov 01, 2012 4:56 pm
Forum: Beginners
Topic: What size SD card needed?
Replies: 22
Views: 104580

Re: What size SD card needed?

If you have an external HDD, and are willing to put the time and effort into splitting the main partition onto it, and only the boot partition onto the SD card, it is possible to get away with a 64MB card.
by holmez
Sat Aug 11, 2012 12:10 pm
Forum: General discussion
Topic: What 4 to 7 inch LCD screen are you using?
Replies: 7
Views: 7309

Re: What 4 to 7 inch LCD screen are you using?

You might want to have a look at the Screens and displays forum under Projects.
by holmez
Thu Aug 09, 2012 9:43 am
Forum: Other projects
Topic: adding this screen help please.
Replies: 22
Views: 4151

Re: adding this screen help please.

Should be fine. It seems to be a fairly common plan. See here . You're basically using 6 GPIO pins as output to feed: RS and E (control pins on the screen) DB4-7 (the 4 data bus pins) You will need to make sure to connect R/W pin to the ground. Other advice has been to connect DB0-3 to ground as wel...
by holmez
Thu Aug 02, 2012 8:15 pm
Forum: Beginners
Topic: Solar Powered Pi's
Replies: 22
Views: 11924

Re: Solar Powered Pi's

Perhaps you should have a look at this thread from the Networking and servers forum.

The basic conclusion was that a 14W solar panel + a deep cycle leisure battery might be sufficient.
by holmez
Mon Jul 30, 2012 8:56 pm
Forum: Staffroom, classroom and projects
Topic: Lego RCX/NXT robotic programming with Pi.
Replies: 33
Views: 40776

Re: Lego RCX/NXT robotic programming with Pi.

I've had a first thought of this too. I have a much older robotic, the RCX. I'm more interested in connecting the sensors(motors, light sensor, touch sensor) to the GPIO and doing a simple programme for it. But the hard part is, how much voltage can each sensor take in? I was wondering about using ...
by holmez
Mon Jul 30, 2012 7:29 am
Forum: General discussion
Topic: Question about Pi
Replies: 5
Views: 780

Re: Question about Pi

Forgot to ask one more, can I install programs etc into the sd card that will contain debian image, or nothing else than image can be installed on sd card, and need to connect a drive (hard drive, usb etc) Yes you can. How much extra depends on the size of the SD card. A 2Gb card has a very limited...
by holmez
Sun Jul 29, 2012 12:57 pm
Forum: General discussion
Topic: Shouldn't Rpi developers be payed by the Foundation?
Replies: 36
Views: 4331

Re: Shouldn't Rpi developers be payed by the Foundation?

Perhaps get some college students on the job, who are willing to work for a fraction of the price of a normal software contractor? I disagree with the type of economics that sees "employees" as a cost. They help you earn more instead. May not be an issue at the moment, while sales are still high, b...
by holmez
Fri Jul 27, 2012 9:13 am
Forum: General discussion
Topic: Shouldn't Rpi developers be payed by the Foundation?
Replies: 36
Views: 4331

Re: Shouldn't Rpi developers be payed by the Foundation?

Perhaps it doesn't matter. One of the best things you can do to get ahead in life is to give your time to something. The big names (Eben, Liz, Jim et al) may not make their millions directly from the pi, but are sure to make far more indirectly.
by holmez
Sun Jul 22, 2012 10:54 am
Forum: Troubleshooting
Topic: USB - the Elephant in our Room
Replies: 802
Views: 259681

Re: USB - the Elephant in our Room

Back in the day of early CB radio one of the tricks wasto run the CB from a battery but leave the battery attached to a battery charger. That way the battery acted as a voltage stabaliser. I was wondering if a small LI-recharge battery in the power line could perform the same with the pi and would ...
by holmez
Fri Jul 20, 2012 8:55 pm
Forum: Troubleshooting
Topic: Mouse and keyboard: strange behaviour
Replies: 10
Views: 2038

Re: Mouse and keyboard: strange behaviour

Any thoughts? I'm seeing two schools of thought currently on this and similar issues - 1) There appears to be a lot of problems with low quality hub and/or hub power supplies. Some hubs are not fully compliant with USB standards, others are just cheap tat that you can get away with on a PC but the ...
by holmez
Thu Jul 19, 2012 4:43 pm
Forum: Troubleshooting
Topic: Mouse and keyboard: strange behaviour
Replies: 10
Views: 2038

Re: Mouse and keyboard: strange behaviour

I also have a mouse/keyboard problem: Both the keyboard and the mouse work when plugged directly into the rpi. An HDD works in my USB hub. But neither my mouse nor my keyboard work when plugged into the hub, even if I only have hub, mouse and keyboard plugged in. Everything is powered by a 1A adapto...
by holmez
Sat Jul 14, 2012 10:23 am
Forum: General discussion
Topic: RPi Power Supply
Replies: 38
Views: 17787

Re: RPi Power Supply

So, in all the time you were waiting for your Pi to arrive, you didn't think to check what powersupply it needs? ;) http://www.raspberrypi.org/faqs http://elinux.org/RPi_Hardware_Basic_Setup#Typical_Hardware_You_Will_Need I was in the same situation. Primarily because I didn't realise that there we...

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